Fighting Scorching Arizona Phoenix Weather with Cool Roofs

arizona phoenix weather cool roof

Temperatures in cities like Phoenix, Arizona are significantly higher than those in surrounding rural areas. This phenomenon is called urban heat island effect. A city that is warmer than its neighboring rural areas is called an urban heat island (UHI).

The UHI effect experienced due to Arizona Phoenix weather is felt more at night than during the day and during winter and summer. On average the temperature difference between urban and rural areas during the afternoon is around 7 degrees Fahrenheit. In certain areas the difference could reach up to 10 degrees Fahrenheit.

The primary cause of this peculiar condition is human activities, particularly the modifications of land surfaces in cities.

Causes of UHI Effect

Studies identified at least three important factors that contribute to the UHI effect. These are:

  1. Reduced area of vegetation in urban cities compared to rural areas. Fifty six percent of UHI effect is attributed to this factor.
  2. Dark paving or land surface, which accounts for a six percent difference in temperatures.
  3. Dark roofing used on buildings, which accounts for a significant thirty eight percent of UHI effect.

Solutions for UHI Effects

  1. A logical solution under the first scenario is to increase vegetation in cities to reduce temperature. However, this method is considered a long-term solution because it will take years, even decades, to enjoy the full benefits of planting trees and improving vegetation in a rural land. Notably, the solution will always be in a catch-up mode because human progress and expansion always lead to fewer vegetation.
  2. The second problem could be remedied by installing lighter-colored pavements on city streets. The technology to implement this solution already exists today. Unfortunately, it will require substantial capital expenditures and the resulting improvement in temperature is negligible. This method is not cost-effective and also considered a long-term solution.
  3. The third cause of UHI effect has the best solution relative to the other two. Installing reflective and cool roofing on buildings offers the biggest benefit in terms of money spent and period of effectiveness. Compared to the other two solutions, using cool roofs to offset warming is easy to accomplish, relatively inexpensive, and its benefits can be immediately attained.

Cool Roofs to the Rescue

Cool roofs use reflective surface to direct the heat of sunlight away from the structure. A light-colored and reflective surface absorbs less heat from the sun unlike a dark, non-reflective roof. Because of the enormous benefits derived from using cool roofs such as reduction of heat in the building and savings on energy bills, more homeowners are using this type of roofing over conventional roofs.

Rust-Oleum Leak Seal Flexible Rubber Coating for Arizona Roofing


Roof leaks and cracks are inevitable regardless of the material that you used on your Arizona roofing. Defects in workmanship, poor material quality and deterioration through time are common causes of leaks. Fortunately, the market is flooded with roof repair products that seal cracks and prevent leaks.

The Rust-Oleum Leak Seal Flexible Sealant

One of the best-known products out there is the Rust-Oleum Leak Seal Flexible Coating. It is a rubberized utility coating that instantly seals leaks. It is convenient to use because you do not need a brush or trowel to apply it on the roof – you only have to spray it on the affected part of the roof, and it will do its work.

How It Works

It works by filling and sealing cracks to provide a watertight seal that effectively prevents water penetration and corrosion. It maintains flexibility despite being exposed to temperature fluctuations and Ultraviolet radiation. The product can be used on practically all types of roof surfaces, including vinyl, metal, plastic, concrete and PVC.

Leak Seal may be used other than repairing roof leaks. It has been proven to be effective when used to seal leaks on sun roofs, vents, gutters, ductwork and fountain cracks. Its other uses include sealing leaks on air conditioner drip pans, downspouts, concrete foundations and pipes.

Once sprayed on the surface, Leak Seal dries to a semi-smooth firm black finish that does not drip or sag. Coating it over with latex or alkyd-based paints are allowed.

How Customers Rate It

It is not surprising that customers’ feedback on the Leak Seal is consistently favorable. Those who bought the product used it on different surfaces with the same positive result. It was sprayed on a fountain and worked perfectly – the customer did not notice any peeling or chipping. Leak Seal was also sprayed to stop leak on the toilet flooring. It produced a watertight seal.

Another customer who bought the product used it on the leaking sunroof of his van. Despite the movement and vibration of the vehicle and an onslaught of rain that fell 24 hours after Leak Seal was applied, not a single drop was noted inside the van.

The trust that people put on this product is exemplified by a customer who bought the Leak Seal as a tool to use in an emergency, or those situations when leaks could occur at the most inconvenient times.

Based on the confidence and positive reviews given by customers on the product, Leak Seal is undoubtedly a clear winner in instantly and conveniently repairing leaks.

Roofing Materials That Could Withstand Arizona Phoenix Weather


One of the hottest cities in the US is Phoenix, Arizona. It holds the highest average temperature during summer among major cities with temperatures exceeding 100 degrees.

Because of the hot Arizona Phoenix weather, keeping cool is a primary consideration in house construction and repairs. Most structures use air-conditioning to keep the temperature cool inside. However, this is not the primary factor planners have in mind when constructing houses. Their priority is the roof, particularly using the correct materials and design to combat heat.

Builders choose from a wide selection of roofing materials. There are, however, certain materials that are better suited for places with hot weather like Phoenix, Arizona. Some of these are:

Terra Cotta and Clay

The cooling effects brought by terra cotta roofs are found not only on the materials used but also on the design itself. The curved or “S”-shaped roofing materials are placed in interlocking fashion to form beautiful arches. The spaces between the tiles allow air to freely flow and circulate, thereby rapidly dissipating heat and keeping the structure cool inside.

Rubber Membrane

A product of modern technology, rubber roofing is made from thermoplastic or ethylene propylene diene Monomer (EPDM), a synthetic rubber. The reflective properties of the rubber minimize heat absorption from the sun and keep the structure cool. Roofers get extra benefits from using rubber-membrane roofing – waterproofing the roof because of their seamless nature, which further prolongs the roof lifespan by preventing water from seeping in.


An affordable alternative to other roofing materials that many builders in hot countries prefer because it takes a long time to heat up from being exposed to the sun. Concretes are either poured to form slab roofs or installed as tiles. An added advantage from using concrete roofing materials is their fire-proof qualities. Roofers can enhance the cooling capabilities of concrete roofs by using light colors that reflect sunlight.

Slate Tiles

A very common roofing materials that originated during the 17th century. Slates come from natural stones and are available in light and earth-toned colors. The material’s reflective properties reduce heat absorption from the sun and keep the building interior cooler. Its global use can be attributed to its reputation as a cool material for roofing and availability in places where slates are abundant.

Solar Panels

Phoenix, Arizona with its arid weather and long sunny days is perfect for this type of roofing system. Solar panels or photovoltaic roof shingles do not actually reflect sunlight but absorb them and convert the heat into electricity.